content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------------------
   * XYLineAndShapeRenderer.java
   * ---------------------------
   * (C) Copyright 2004-2012, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes:
   * --------
   * 27-Jan-2004 : Version 1 (DG);
   * 10-Feb-2004 : Minor change to drawItem() method to make cut-and-paste
   *               overriding easier (DG);
   * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState (DG);
   * 25-Aug-2004 : Added support for chart entities (required for tooltips) (DG);
   * 24-Sep-2004 : Added flag to allow whole series to be drawn as a path
   *               (necessary when using a dashed stroke with many data
   *               items) (DG);
   * 04-Oct-2004 : Renamed BooleanUtils --> BooleanUtilities (DG);
   * 11-Nov-2004 : Now uses ShapeUtilities to translate shapes (DG);
   * 27-Jan-2005 : The getLegendItem() method now omits hidden series (DG);
   * 28-Jan-2005 : Added new constructor (DG);
   * 09-Mar-2005 : Added fillPaint settings (DG);
   * 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
   * 22-Jul-2005 : Renamed defaultLinesVisible --> baseLinesVisible,
   *               defaultShapesVisible --> baseShapesVisible and
   *               defaultShapesFilled --> baseShapesFilled (DG);
   * 29-Jul-2005 : Added code to draw item labels (DG);
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 20-Jul-2006 : Set dataset and series indices in LegendItem (DG);
   * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG);
   * 21-Feb-2007 : Fixed bugs in clone() and equals() (DG);
   * 20-Apr-2007 : Updated getLegendItem() for renderer change (DG);
   * 18-May-2007 : Set dataset and seriesKey for LegendItem (DG);
   * 08-Jun-2007 : Fix for bug 1731912 where entities are created even for data
   *               items that are not displayed (DG);
   * 26-Oct-2007 : Deprecated override attributes (DG);
   * 02-Jun-2008 : Fixed tooltips at lower edges of data area (DG);
   * 17-Jun-2008 : Apply legend shape, font and paint attributes (DG);
   * 19-Sep-2008 : Fixed bug with drawSeriesLineAsPath - patch by Greg Darke (DG);
   * 18-May-2009 : Clip lines in drawPrimaryLine() (DG);
   * 15-Jun-2012 : Removed JCommon dependencies (DG);
   * 01-Jul-2012 : Remove deprecated code (DG);
   * 
   */
  
  package org.jfree.chart.renderer.xy;
  
  import java.awt.Graphics2D;
  import java.awt.Paint;
  import java.awt.Shape;
  import java.awt.Stroke;
  import java.awt.geom.GeneralPath;
  import java.awt.geom.Line2D;
  import java.awt.geom.Rectangle2D;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  
  import org.jfree.chart.LegendItem;
  import org.jfree.chart.axis.ValueAxis;
  import org.jfree.chart.ui.RectangleEdge;
  import org.jfree.chart.util.BooleanList;
  import org.jfree.chart.util.ObjectUtilities;
  import org.jfree.chart.util.PublicCloneable;
  import org.jfree.chart.util.ShapeUtilities;
  import org.jfree.chart.entity.EntityCollection;
  import org.jfree.chart.event.RendererChangeEvent;
  import org.jfree.chart.plot.CrosshairState;
  import org.jfree.chart.plot.PlotOrientation;
  import org.jfree.chart.plot.PlotRenderingInfo;
  import org.jfree.chart.plot.XYPlot;
  import org.jfree.chart.util.LineUtilities;
  import org.jfree.chart.util.SerialUtilities;
  import org.jfree.data.xy.XYDataset;
  
  /**
   * A renderer that connects data points with lines and/or draws shapes at each
   * data point.  This renderer is designed for use with the {@link XYPlot}
   * class.  The example shown here is generated by
   * the <code>XYLineAndShapeRendererDemo2.java</code> program included in the
   * JFreeChart demo collection:
   * <br><br>
   * <img src="../../../../../images/XYLineAndShapeRendererSample.png"
   * alt="XYLineAndShapeRendererSample.png" />
   *
   */
  public class XYLineAndShapeRenderer extends AbstractXYItemRenderer
          implements XYItemRenderer, Cloneable, PublicCloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = -7435246895986425885L;
  
      /**
       * A table of flags that control (per series) whether or not lines are
       * visible.
       */
      private BooleanList seriesLinesVisible;
  
      /** The default value returned by the getLinesVisible() method. */
      private boolean baseLinesVisible;
  
      /** The shape that is used to represent a line in the legend. */
      private transient Shape legendLine;
  
      /**
       * A table of flags that control (per series) whether or not shapes are
       * visible.
       */
      private BooleanList seriesShapesVisible;
  
      /** The default value returned by the getShapeVisible() method. */
      private boolean baseShapesVisible;
  
      /**
       * A table of flags that control (per series) whether or not shapes are
       * filled.
       */
      private BooleanList seriesShapesFilled;
  
      /** The default value returned by the getShapeFilled() method. */
      private boolean baseShapesFilled;
  
      /** A flag that controls whether outlines are drawn for shapes. */
      private boolean drawOutlines;
  
      /**
       * A flag that controls whether the fill paint is used for filling
       * shapes.
       */
      private boolean useFillPaint;
  
      /**
       * A flag that controls whether the outline paint is used for drawing shape
       * outlines.
       */
      private boolean useOutlinePaint;
  
      /**
       * A flag that controls whether or not each series is drawn as a single
       * path.
       */
      private boolean drawSeriesLineAsPath;
  
      /**
       * Creates a new renderer with both lines and shapes visible.
       */
      public XYLineAndShapeRenderer() {
          this(true, true);
      }
  
      /**
       * Creates a new renderer.
       *
       * @param lines  lines visible?
       * @param shapes  shapes visible?
       */
      public XYLineAndShapeRenderer(boolean lines, boolean shapes) {
  
          this.seriesLinesVisible = new BooleanList();
          this.baseLinesVisible = lines;
          this.legendLine = new Line2D.Double(-7.0, 0.0, 7.0, 0.0);
  
          this.seriesShapesVisible = new BooleanList();
          this.baseShapesVisible = shapes;
  
          this.useFillPaint = false;     // use item paint for fills by default
          this.seriesShapesFilled = new BooleanList();
          this.baseShapesFilled = true;
  
          this.drawOutlines = true;
          this.useOutlinePaint = false;  // use item paint for outlines by
                                         // default, not outline paint
  
          this.drawSeriesLineAsPath = false;
      }
  
      /**
       * Returns a flag that controls whether or not each series is drawn as a
       * single path.
       *
       * @return A boolean.
       *
       * @see #setDrawSeriesLineAsPath(boolean)
       */
      public boolean getDrawSeriesLineAsPath() {
          return this.drawSeriesLineAsPath;
      }
  
      /**
       * Sets the flag that controls whether or not each series is drawn as a
       * single path and sends a {@link RendererChangeEvent} to all registered
       * listeners.
       *
       * @param flag  the flag.
       *
       * @see #getDrawSeriesLineAsPath()
       */
      public void setDrawSeriesLineAsPath(boolean flag) {
          if (this.drawSeriesLineAsPath != flag) {
              this.drawSeriesLineAsPath = flag;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the number of passes through the data that the renderer requires
       * in order to draw the chart.  Most charts will require a single pass, but
       * some require two passes.
       *
       * @return The pass count.
       */
      @Override
      public int getPassCount() {
          return 2;
      }
  
      // LINES VISIBLE
  
      /**
       * Returns the flag used to control whether or not the shape for an item is
       * visible.
       *
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       *
       * @return A boolean.
       */
      public boolean getItemLineVisible(int series, int item) {
          Boolean flag = getSeriesLinesVisible(series);
          if (flag != null) {
              return flag;
          }
          return this.baseLinesVisible;
      }
  
      /**
       * Returns the flag used to control whether or not the lines for a series
       * are visible.
       *
       * @param series  the series index (zero-based).
       *
       * @return The flag (possibly <code>null</code>).
       *
       * @see #setSeriesLinesVisible(int, Boolean)
       */
      public Boolean getSeriesLinesVisible(int series) {
          return this.seriesLinesVisible.getBoolean(series);
      }
  
      /**
       * Sets the 'lines visible' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param flag  the flag (<code>null</code> permitted).
       *
       * @see #getSeriesLinesVisible(int)
       */
      public void setSeriesLinesVisible(int series, Boolean flag) {
          this.seriesLinesVisible.setBoolean(series, flag);
          fireChangeEvent();
      }
  
      /**
       * Sets the 'lines visible' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param visible  the flag.
       *
       * @see #getSeriesLinesVisible(int)
       */
      public void setSeriesLinesVisible(int series, boolean visible) {
          setSeriesLinesVisible(series, Boolean.valueOf(visible));
      }
  
      /**
       * Returns the base 'lines visible' attribute.
       *
       * @return The base flag.
       *
       * @see #setBaseLinesVisible(boolean)
       */
      public boolean getBaseLinesVisible() {
          return this.baseLinesVisible;
      }
  
      /**
       * Sets the base 'lines visible' flag and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param flag  the flag.
       *
       * @see #getBaseLinesVisible()
       */
      public void setBaseLinesVisible(boolean flag) {
          this.baseLinesVisible = flag;
          fireChangeEvent();
      }
  
      /**
       * Returns the shape used to represent a line in the legend.
       *
       * @return The legend line (never <code>null</code>).
       *
       * @see #setLegendLine(Shape)
       */
      public Shape getLegendLine() {
          return this.legendLine;
      }
  
      /**
       * Sets the shape used as a line in each legend item and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param line  the line (<code>null</code> not permitted).
       *
       * @see #getLegendLine()
       */
      public void setLegendLine(Shape line) {
          if (line == null) {
              throw new IllegalArgumentException("Null 'line' argument.");
          }
          this.legendLine = line;
          fireChangeEvent();
      }
  
      // SHAPES VISIBLE
  
      /**
       * Returns the flag used to control whether or not the shape for an item is
       * visible.
       * <p>
       * The default implementation passes control to the
       * <code>getSeriesShapesVisible</code> method. You can override this method
       * if you require different behaviour.
       *
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       *
       * @return A boolean.
       */
      public boolean getItemShapeVisible(int series, int item) {
          Boolean flag = getSeriesShapesVisible(series);
          if (flag != null) {
              return flag;
          }
          return this.baseShapesVisible;
      }
  
      /**
       * Returns the flag used to control whether or not the shapes for a series
       * are visible.
       *
       * @param series  the series index (zero-based).
       *
       * @return A boolean.
       *
       * @see #setSeriesShapesVisible(int, Boolean)
       */
      public Boolean getSeriesShapesVisible(int series) {
          return this.seriesShapesVisible.getBoolean(series);
      }
  
      /**
       * Sets the 'shapes visible' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param visible  the flag.
       *
       * @see #getSeriesShapesVisible(int)
       */
      public void setSeriesShapesVisible(int series, boolean visible) {
          setSeriesShapesVisible(series, Boolean.valueOf(visible));
      }
  
      /**
       * Sets the 'shapes visible' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param flag  the flag.
       *
       * @see #getSeriesShapesVisible(int)
       */
      public void setSeriesShapesVisible(int series, Boolean flag) {
          this.seriesShapesVisible.setBoolean(series, flag);
          fireChangeEvent();
      }
  
      /**
       * Returns the base 'shape visible' attribute.
       *
       * @return The base flag.
       *
       * @see #setBaseShapesVisible(boolean)
       */
      public boolean getBaseShapesVisible() {
          return this.baseShapesVisible;
      }
  
      /**
       * Sets the base 'shapes visible' flag and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param flag  the flag.
       *
       * @see #getBaseShapesVisible()
       */
      public void setBaseShapesVisible(boolean flag) {
          this.baseShapesVisible = flag;
          fireChangeEvent();
      }
  
      // SHAPES FILLED
  
      /**
       * Returns the flag used to control whether or not the shape for an item
       * is filled.
       * <p>
       * The default implementation passes control to the
       * <code>getSeriesShapesFilled</code> method. You can override this method
       * if you require different behaviour.
       *
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       *
       * @return A boolean.
       */
      public boolean getItemShapeFilled(int series, int item) {
          Boolean flag = getSeriesShapesFilled(series);
          if (flag != null) {
              return flag;
          }
          return this.baseShapesFilled;
      }
  
      /**
       * Returns the flag used to control whether or not the shapes for a series
       * are filled.
       *
       * @param series  the series index (zero-based).
       *
       * @return A boolean.
       *
       * @see #setSeriesShapesFilled(int, Boolean)
       */
      public Boolean getSeriesShapesFilled(int series) {
          return this.seriesShapesFilled.getBoolean(series);
      }
  
      /**
       * Sets the 'shapes filled' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param flag  the flag.
       *
       * @see #getSeriesShapesFilled(int)
       */
      public void setSeriesShapesFilled(int series, boolean flag) {
          setSeriesShapesFilled(series, Boolean.valueOf(flag));
      }
  
      /**
       * Sets the 'shapes filled' flag for a series and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param series  the series index (zero-based).
       * @param flag  the flag.
       *
       * @see #getSeriesShapesFilled(int)
       */
      public void setSeriesShapesFilled(int series, Boolean flag) {
          this.seriesShapesFilled.setBoolean(series, flag);
          fireChangeEvent();
      }
  
      /**
       * Returns the base 'shape filled' attribute.
       *
       * @return The base flag.
       *
       * @see #setBaseShapesFilled(boolean)
       */
      public boolean getBaseShapesFilled() {
          return this.baseShapesFilled;
      }
  
      /**
       * Sets the base 'shapes filled' flag and sends a
       * {@link RendererChangeEvent} to all registered listeners.
       *
       * @param flag  the flag.
       *
       * @see #getBaseShapesFilled()
       */
      public void setBaseShapesFilled(boolean flag) {
          this.baseShapesFilled = flag;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if outlines should be drawn for shapes, and
       * <code>false</code> otherwise.
       *
       * @return A boolean.
       *
       * @see #setDrawOutlines(boolean)
       */
      public boolean getDrawOutlines() {
          return this.drawOutlines;
      }
  
      /**
       * Sets the flag that controls whether outlines are drawn for
       * shapes, and sends a {@link RendererChangeEvent} to all registered
       * listeners.
       * <P>
       * In some cases, shapes look better if they do NOT have an outline, but
       * this flag allows you to set your own preference.
       *
       * @param flag  the flag.
       *
       * @see #getDrawOutlines()
       */
      public void setDrawOutlines(boolean flag) {
          this.drawOutlines = flag;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if the renderer should use the fill paint
       * setting to fill shapes, and <code>false</code> if it should just
       * use the regular paint.
       * <p>
       * Refer to <code>XYLineAndShapeRendererDemo2.java</code> to see the
       * effect of this flag.
       *
       * @return A boolean.
       *
       * @see #setUseFillPaint(boolean)
       * @see #getUseOutlinePaint()
       */
      public boolean getUseFillPaint() {
          return this.useFillPaint;
      }
  
      /**
       * Sets the flag that controls whether the fill paint is used to fill
       * shapes, and sends a {@link RendererChangeEvent} to all
       * registered listeners.
       *
       * @param flag  the flag.
       *
       * @see #getUseFillPaint()
       */
      public void setUseFillPaint(boolean flag) {
          this.useFillPaint = flag;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if the renderer should use the outline paint
       * setting to draw shape outlines, and <code>false</code> if it should just
       * use the regular paint.
       *
       * @return A boolean.
       *
       * @see #setUseOutlinePaint(boolean)
       * @see #getUseFillPaint()
       */
      public boolean getUseOutlinePaint() {
          return this.useOutlinePaint;
      }
  
      /**
       * Sets the flag that controls whether the outline paint is used to draw
       * shape outlines, and sends a {@link RendererChangeEvent} to all
       * registered listeners.
       * <p>
       * Refer to <code>XYLineAndShapeRendererDemo2.java</code> to see the
       * effect of this flag.
       *
       * @param flag  the flag.
       *
       * @see #getUseOutlinePaint()
       */
      public void setUseOutlinePaint(boolean flag) {
          this.useOutlinePaint = flag;
          fireChangeEvent();
      }
  
      /**
       * Records the state for the renderer.  This is used to preserve state
       * information between calls to the drawItem() method for a single chart
       * drawing.
       */
      public static class State extends XYItemRendererState {
  
          /** The path for the current series. */
          public GeneralPath seriesPath;
  
          /**
           * A flag that indicates if the last (x, y) point was 'good'
           * (non-null).
           */
          private boolean lastPointGood;
  
          /**
           * Creates a new state instance.
           *
           * @param info  the plot rendering info.
           */
          public State(PlotRenderingInfo info) {
              super(info);
          }
  
          /**
           * Returns a flag that indicates if the last point drawn (in the
           * current series) was 'good' (non-null).
           *
           * @return A boolean.
           */
          public boolean isLastPointGood() {
              return this.lastPointGood;
          }
  
          /**
           * Sets a flag that indicates if the last point drawn (in the current
           * series) was 'good' (non-null).
           *
           * @param good  the flag.
           */
          public void setLastPointGood(boolean good) {
              this.lastPointGood = good;
          }
  
          /**
           * This method is called by the {@link XYPlot} at the start of each
           * series pass.  We reset the state for the current series.
           *
           * @param dataset  the dataset.
           * @param series  the series index.
           * @param firstItem  the first item index for this pass.
           * @param lastItem  the last item index for this pass.
           * @param pass  the current pass index.
           * @param passCount  the number of passes.
           */
          @Override
          public void startSeriesPass(XYDataset dataset, int series,
                  int firstItem, int lastItem, int pass, int passCount) {
              this.seriesPath.reset();
              this.lastPointGood = false;
              super.startSeriesPass(dataset, series, firstItem, lastItem, pass,
                      passCount);
         }
  
      }
  
      /**
       * Initialises the renderer.
       * <P>
       * This method will be called before the first item is rendered, giving the
       * renderer an opportunity to initialise any state information it wants to
       * maintain.  The renderer can do nothing if it chooses.
       *
       * @param g2  the graphics device.
       * @param dataArea  the area inside the axes.
       * @param plot  the plot.
       * @param data  the data.
       * @param info  an optional info collection object to return data back to
       *              the caller.
       *
       * @return The renderer state.
       */
      @Override
      public XYItemRendererState initialise(Graphics2D g2,
                                            Rectangle2D dataArea,
                                            XYPlot plot,
                                            XYDataset data,
                                            PlotRenderingInfo info) {
  
          State state = new State(info);
          state.seriesPath = new GeneralPath();
          return state;
  
      }
  
      /**
       * Draws the visual representation of a single data item.
       *
       * @param g2  the graphics device.
       * @param state  the renderer state.
       * @param dataArea  the area within which the data is being drawn.
       * @param info  collects information about the drawing.
       * @param plot  the plot (can be used to obtain standard color
       *              information etc).
       * @param domainAxis  the domain axis.
       * @param rangeAxis  the range axis.
       * @param dataset  the dataset.
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       * @param crosshairState  crosshair information for the plot
       *                        (<code>null</code> permitted).
       * @param pass  the pass index.
       */
      @Override
      public void drawItem(Graphics2D g2,
                           XYItemRendererState state,
                           Rectangle2D dataArea,
                           PlotRenderingInfo info,
                           XYPlot plot,
                           ValueAxis domainAxis,
                           ValueAxis rangeAxis,
                           XYDataset dataset,
                           int series,
                           int item,
                           CrosshairState crosshairState,
                           int pass) {
  
          // do nothing if item is not visible
          if (!getItemVisible(series, item)) {
              return;
          }
  
          // first pass draws the background (lines, for instance)
          if (isLinePass(pass)) {
              if (getItemLineVisible(series, item)) {
                  if (this.drawSeriesLineAsPath) {
                      drawPrimaryLineAsPath(state, g2, plot, dataset, pass,
                              series, item, domainAxis, rangeAxis, dataArea);
                  }
                  else {
                      drawPrimaryLine(state, g2, plot, dataset, pass, series,
                              item, domainAxis, rangeAxis, dataArea);
                  }
              }
          }
          // second pass adds shapes where the items are ..
          else if (isItemPass(pass)) {
  
              // setup for collecting optional entity info...
              EntityCollection entities = null;
              if (info != null) {
                  entities = info.getOwner().getEntityCollection();
              }
  
              drawSecondaryPass(g2, plot, dataset, pass, series, item,
                      domainAxis, dataArea, rangeAxis, crosshairState, entities);
          }
      }
  
      /**
       * Returns <code>true</code> if the specified pass is the one for drawing
       * lines.
       *
       * @param pass  the pass.
       *
       * @return A boolean.
       */
      protected boolean isLinePass(int pass) {
          return pass == 0;
      }
  
      /**
       * Returns <code>true</code> if the specified pass is the one for drawing
       * items.
       *
       * @param pass  the pass.
       *
       * @return A boolean.
       */
      protected boolean isItemPass(int pass) {
          return pass == 1;
      }
  
      /**
       * Draws the item (first pass). This method draws the lines
       * connecting the items.
       *
       * @param g2  the graphics device.
       * @param state  the renderer state.
       * @param dataArea  the area within which the data is being drawn.
       * @param plot  the plot (can be used to obtain standard color
       *              information etc).
       * @param domainAxis  the domain axis.
       * @param rangeAxis  the range axis.
       * @param dataset  the dataset.
       * @param pass  the pass.
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       */
      protected void drawPrimaryLine(XYItemRendererState state,
                                     Graphics2D g2,
                                     XYPlot plot,
                                     XYDataset dataset,
                                     int pass,
                                     int series,
                                     int item,
                                     ValueAxis domainAxis,
                                     ValueAxis rangeAxis,
                                     Rectangle2D dataArea) {
          if (item == 0) {
              return;
          }
  
          // get the data point...
          double x1 = dataset.getXValue(series, item);
          double y1 = dataset.getYValue(series, item);
          if (Double.isNaN(y1) || Double.isNaN(x1)) {
              return;
          }
  
          double x0 = dataset.getXValue(series, item - 1);
          double y0 = dataset.getYValue(series, item - 1);
          if (Double.isNaN(y0) || Double.isNaN(x0)) {
              return;
          }
  
          RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
          RectangleEdge yAxisLocation = plot.getRangeAxisEdge();
  
          double transX0 = domainAxis.valueToJava2D(x0, dataArea, xAxisLocation);
          double transY0 = rangeAxis.valueToJava2D(y0, dataArea, yAxisLocation);
  
          double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation);
          double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation);
  
          // only draw if we have good values
          if (Double.isNaN(transX0) || Double.isNaN(transY0)
              || Double.isNaN(transX1) || Double.isNaN(transY1)) {
              return;
          }
  
          PlotOrientation orientation = plot.getOrientation();
          boolean visible = false;
          if (orientation == PlotOrientation.HORIZONTAL) {
              state.workingLine.setLine(transY0, transX0, transY1, transX1);
          }
          else if (orientation == PlotOrientation.VERTICAL) {
              state.workingLine.setLine(transX0, transY0, transX1, transY1);
          }
          visible = LineUtilities.clipLine(state.workingLine, dataArea);
          if (visible) {
              drawFirstPassShape(g2, pass, series, item, state.workingLine);
          }
      }
  
      /**
       * Draws the first pass shape.
       *
       * @param g2  the graphics device.
       * @param pass  the pass.
       * @param series  the series index.
       * @param item  the item index.
       * @param shape  the shape.
       */
      protected void drawFirstPassShape(Graphics2D g2, int pass, int series,
                                        int item, Shape shape) {
          g2.setStroke(getItemStroke(series, item));
          g2.setPaint(getItemPaint(series, item));
          g2.draw(shape);
      }
  
  
      /**
       * Draws the item (first pass). This method draws the lines
       * connecting the items. Instead of drawing separate lines,
       * a GeneralPath is constructed and drawn at the end of
       * the series painting.
       *
       * @param g2  the graphics device.
       * @param state  the renderer state.
       * @param plot  the plot (can be used to obtain standard color information
       *              etc).
       * @param dataset  the dataset.
       * @param pass  the pass.
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       * @param domainAxis  the domain axis.
       * @param rangeAxis  the range axis.
       * @param dataArea  the area within which the data is being drawn.
       */
      protected void drawPrimaryLineAsPath(XYItemRendererState state,
                                           Graphics2D g2, XYPlot plot,
                                           XYDataset dataset,
                                           int pass,
                                           int series,
                                           int item,
                                           ValueAxis domainAxis,
                                           ValueAxis rangeAxis,
                                           Rectangle2D dataArea) {
  
  
          RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
          RectangleEdge yAxisLocation = plot.getRangeAxisEdge();
  
          // get the data point...
          double x1 = dataset.getXValue(series, item);
          double y1 = dataset.getYValue(series, item);
          double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation);
          double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation);
  
          State s = (State) state;
          // update path to reflect latest point
          if (!Double.isNaN(transX1) && !Double.isNaN(transY1)) {
              float x = (float) transX1;
              float y = (float) transY1;
              PlotOrientation orientation = plot.getOrientation();
              if (orientation == PlotOrientation.HORIZONTAL) {
                  x = (float) transY1;
                  y = (float) transX1;
              }
              if (s.isLastPointGood()) {
                  s.seriesPath.lineTo(x, y);
              }
              else {
                  s.seriesPath.moveTo(x, y);
              }
              s.setLastPointGood(true);
          }
          else {
              s.setLastPointGood(false);
          }
          // if this is the last item, draw the path ...
          if (item == s.getLastItemIndex()) {
              // draw path
              drawFirstPassShape(g2, pass, series, item, s.seriesPath);
          }
      }
  
      /**
       * Draws the item shapes and adds chart entities (second pass). This method
       * draws the shapes which mark the item positions. If <code>entities</code>
       * is not <code>null</code> it will be populated with entity information
       * for points that fall within the data area.
       *
       * @param g2  the graphics device.
       * @param plot  the plot (can be used to obtain standard color
       *              information etc).
       * @param domainAxis  the domain axis.
       * @param dataArea  the area within which the data is being drawn.
       * @param rangeAxis  the range axis.
       * @param dataset  the dataset.
       * @param pass  the pass.
       * @param series  the series index (zero-based).
       * @param item  the item index (zero-based).
       * @param crosshairState  the crosshair state.
       * @param entities the entity collection.
       */
      protected void drawSecondaryPass(Graphics2D g2, XYPlot plot,
                                       XYDataset dataset,
                                       int pass, int series, int item,
                                       ValueAxis domainAxis,
                                       Rectangle2D dataArea,
                                       ValueAxis rangeAxis,
                                       CrosshairState crosshairState,
                                       EntityCollection entities) {
  
          Shape entityArea = null;
  
          // get the data point...
          double x1 = dataset.getXValue(series, item);
          double y1 = dataset.getYValue(series, item);
          if (Double.isNaN(y1) || Double.isNaN(x1)) {
              return;
          }
  
          PlotOrientation orientation = plot.getOrientation();
          RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
          RectangleEdge yAxisLocation = plot.getRangeAxisEdge();
          double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation);
          double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation);
  
          if (getItemShapeVisible(series, item)) {
              Shape shape = getItemShape(series, item);
              if (orientation == PlotOrientation.HORIZONTAL) {
                  shape = ShapeUtilities.createTranslatedShape(shape, transY1,
                          transX1);
              }
              else if (orientation == PlotOrientation.VERTICAL) {
                  shape = ShapeUtilities.createTranslatedShape(shape, transX1,
                          transY1);
              }
              entityArea = shape;
              if (shape.intersects(dataArea)) {
                  if (getItemShapeFilled(series, item)) {
                      if (this.useFillPaint) {
                          g2.setPaint(getItemFillPaint(series, item));
                      }
                      else {
                          g2.setPaint(getItemPaint(series, item));
                      }
                      g2.fill(shape);
                  }
                  if (this.drawOutlines) {
                      if (getUseOutlinePaint()) {
                          g2.setPaint(getItemOutlinePaint(series, item));
                      }
                      else {
                          g2.setPaint(getItemPaint(series, item));
                      }
                      g2.setStroke(getItemOutlineStroke(series, item));
                      g2.draw(shape);
                  }
              }
          }
  
          double xx = transX1;
          double yy = transY1;
          if (orientation == PlotOrientation.HORIZONTAL) {
              xx = transY1;
              yy = transX1;
          }
  
          // draw the item label if there is one...
          if (isItemLabelVisible(series, item)) {
              drawItemLabel(g2, orientation, dataset, series, item, xx, yy,
                      (y1 < 0.0));
          }
  
          int domainAxisIndex = plot.getDomainAxisIndex(domainAxis);
          int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis);
          updateCrosshairValues(crosshairState, x1, y1, domainAxisIndex,
                  rangeAxisIndex, transX1, transY1, orientation);
  
          // add an entity for the item, but only if it falls within the data
          // area...
          if (entities != null && isPointInRect(dataArea, xx, yy)) {
              addEntity(entities, entityArea, dataset, series, item, xx, yy);
          }
      }
  
  
      /**
       * Returns a legend item for the specified series.
       *
       * @param datasetIndex  the dataset index (zero-based).
       * @param series  the series index (zero-based).
       *
       * @return A legend item for the series (possibly <code>null</code).
       */
      @Override
      public LegendItem getLegendItem(int datasetIndex, int series) {
          XYPlot plot = getPlot();
          if (plot == null) {
              return null;
          }
  
          XYDataset dataset = plot.getDataset(datasetIndex);
          if (dataset == null) {
              return null;
          }
          
          if (!getItemVisible(series, 0)) {
              return null;
          }
          String label = getLegendItemLabelGenerator().generateLabel(dataset,
                  series);
          String description = label;
          String toolTipText = null;
          if (getLegendItemToolTipGenerator() != null) {
              toolTipText = getLegendItemToolTipGenerator().generateLabel(
                      dataset, series);
          }
          String urlText = null;
          if (getLegendItemURLGenerator() != null) {
              urlText = getLegendItemURLGenerator().generateLabel(dataset,
                      series);
          }
          boolean shapeIsVisible = getItemShapeVisible(series, 0);
          Shape shape = lookupLegendShape(series);
          boolean shapeIsFilled = getItemShapeFilled(series, 0);
          Paint fillPaint = (this.useFillPaint ? lookupSeriesFillPaint(series)
                  : lookupSeriesPaint(series));
          boolean shapeOutlineVisible = this.drawOutlines;
          Paint outlinePaint = (this.useOutlinePaint ? lookupSeriesOutlinePaint(
                  series) : lookupSeriesPaint(series));
          Stroke outlineStroke = lookupSeriesOutlineStroke(series);
          boolean lineVisible = getItemLineVisible(series, 0);
          Stroke lineStroke = lookupSeriesStroke(series);
          Paint linePaint = lookupSeriesPaint(series);
          LegendItem result = new LegendItem(label, description, toolTipText,
                  urlText, shapeIsVisible, shape, shapeIsFilled, fillPaint,
                  shapeOutlineVisible, outlinePaint, outlineStroke, lineVisible,
                  this.legendLine, lineStroke, linePaint);
          result.setLabelFont(lookupLegendTextFont(series));
          Paint labelPaint = lookupLegendTextPaint(series);
          if (labelPaint != null) {
              result.setLabelPaint(labelPaint);
          }
          result.setSeriesKey(dataset.getSeriesKey(series));
          result.setSeriesIndex(series);
          result.setDataset(dataset);
          result.setDatasetIndex(datasetIndex);
          
          return result;
      }
  
      /**
       * Returns a clone of the renderer.
       *
       * @return A clone.
       *
       * @throws CloneNotSupportedException if the clone cannot be created.
       */
      @Override
      public Object clone() throws CloneNotSupportedException {
          XYLineAndShapeRenderer clone = (XYLineAndShapeRenderer) super.clone();
          clone.seriesLinesVisible
                  = (BooleanList) this.seriesLinesVisible.clone();
          if (this.legendLine != null) {
              clone.legendLine = ShapeUtilities.clone(this.legendLine);
          }
          clone.seriesShapesVisible
                  = (BooleanList) this.seriesShapesVisible.clone();
          clone.seriesShapesFilled
                  = (BooleanList) this.seriesShapesFilled.clone();
          return clone;
      }
  
      /**
       * Tests this renderer for equality with an arbitrary object.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return <code>true</code> or <code>false</code>.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof XYLineAndShapeRenderer)) {
              return false;
          }
          if (!super.equals(obj)) {
              return false;
          }
          XYLineAndShapeRenderer that = (XYLineAndShapeRenderer) obj;
          if (!ObjectUtilities.equal(this.seriesLinesVisible, 
                  that.seriesLinesVisible)) {
              return false;
          }
          if (this.baseLinesVisible != that.baseLinesVisible) {
              return false;
          }
          if (!ShapeUtilities.equal(this.legendLine, that.legendLine)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.seriesShapesVisible, 
                  that.seriesShapesVisible)) {
              return false;
          }
          if (this.baseShapesVisible != that.baseShapesVisible) {
              return false;
          }
          if (!ObjectUtilities.equal(this.seriesShapesFilled, 
                  that.seriesShapesFilled)) {
              return false;
          }
          if (this.baseShapesFilled != that.baseShapesFilled) {
              return false;
          }
          if (this.drawOutlines != that.drawOutlines) {
              return false;
          }
          if (this.useOutlinePaint != that.useOutlinePaint) {
              return false;
          }
          if (this.useFillPaint != that.useFillPaint) {
              return false;
          }
          if (this.drawSeriesLineAsPath != that.drawSeriesLineAsPath) {
              return false;
          }
          return true;
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
              throws IOException, ClassNotFoundException {
          stream.defaultReadObject();
          this.legendLine = SerialUtilities.readShape(stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          SerialUtilities.writeShape(this.legendLine, stream);
      }
  
  }
  